Download and print yours from Thingiverse.com
If you have a naked 75mm Sherman Tank Brass Casing, this will do the trick perfectly.
There is a ton of other useful stuff on Makersteve.com and more coming every week.
Be sure to check out my Ultimate Build Guide for Creality Ender 3
If you find this useful, please consider purchasing products through any of the links on the page, it’s free to you and I get a little something for my time. Or, just go shopping at Amazon or Ebay or Gearbest using one of these links.
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Or buy me a Ko-fi! Someone buy me a coffee.